Concrete Test Hammer

Features
Measurement inherently independent of impact direction, meaning no directional corrections are necessary
High measuring accuracy due to differential optical absolute velocity encoder
Conversion curves for a wide range of compressive concrete strengths, including low fc (<10 N/mm2, 1’450 psi) and high strength concrete (up to 170 N/mm2, 24’650 psi)
Simple operation with "one-button", combined with advanced tilt and twist technology user interface
Language independent graphical menu with symbols
Automatic conversion to the required measurement unit (N/mm2, kg/cm2, psi)
Applications
Suitable for testing a wide variety of concrete, mortar and rock
Ideally suited for on-site testing
Handy for difficult to access or confined test areas (i.e. working overhead)
Especially convenient for testing on tunnel linings as measurements are independent of impact direction
Assessment on young, soft concrete with mushroom plunger (to indicate when to remove forms or for formwork)
Product Variations
Type BN - Standard impact energy (2.207 Nm)
Type BL - Reduced impact energy (0.735 Nm)
Type UN - Standard impact energy (2.207 Nm) with PC communication and increased memory capacity
Type UL - Reduced impact energy (0.735 Nm) with PC communication and increased memory capacity
Warranties
warranty on electronic indicating units
Optional extended warranty periods up to 3 years
Standardization
EN 12 504-2
ENV 206
BS 1881, part 202
DIN 1048, part 2
ASTM C 805
ASTM D 5873 (Rock)
JGJ/T 23-2001
JJG 817-1993
Technical Data
Mechanical data Type BN/UN Type BL/UL
Impact energy 2.207 Nm 0.735 Nm
Hammer mass 115 g 115 g
Spring constant 0.79 N/mm 0.26 N/mm
Spring extension 75 mm 75 mm
Housing dimensions 55 x 55 x 250 mm (340 mm to tip of plunger)
Plunger dimensions (visible part) 105 x ø15 mm / radius of spherical tip 25 mm
Weight 600 g
PC application
Only for the versions UN and UL Hammerlink Software
Electrical data
Type BN/UN and Type BL/UL
Display 17 x 71 pixels; graphic / alphanumeric
Power consumption ~13 mA measuring, ~4 mA setup and review, ~0.02 mA idle
Accumulator duty >1000 impacts (before recharging)
Charger connection USB type B (5V, 100 mA)
Measuring ranges Type BN/UN and Type BL/UL
Concrete compressive strength BL and UL: 8 N/mm2 to 110 N/mm2 (1'160 psi to 16'000 psi)
BN and UN: 10 N/mm2 to 170 N/mm2 (1'450 psi to 24’650 psi)
BN and UN with mushroom plunger (optional): 5 - 30 N/mm2 (725 psi to 4'400 psi)
Operating temperature 0 to 50 °C
Storage temperature -10 to 70 °C 
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